Automatic casing-perforator for deep wells.



No. 686,69I.

, Patented Nov. 12,1901. E. A. HAnnlson.

AUTOMATIC CASING PEBFORATUR FOR DEEP WELLS` (Hg Model.)

(Application filed Jan. 2, 1901.)

UNITED STATES PATENT OFFICE.

EDWIN A. HAEDIsoN, oF Los ANGELES, CALIFORNIA, AssIeNoR oF ONE- IIALF ToWALLACE L. I-IARDIsoN, oF Los ANGELES, CALIFORNIA.

AUTOMATIC CASlNG-PERFORATOR FOR DEEP WELLS.

SBEGIFIGATION forming part of Letters Patent No. 686,691, dated November12, 1901.

Application filed January 2, 1901. Serial No. 41,876. (No model.)

To @ZZ whom it may concern.-

well-casing exactly where and only where it citizen of the UnitedStates, residing at Los Angeles, in the county of Los Angeles and Stateof California, have invented a new and useful Improvement in AutomaticCasing- Perforators for Deep Wells, of which the following is aspecification.

This invention is an improvement upon my automatic casing-perforator fordeep Wells set forth in Letters Patent of the United States datedMay 22,1900, No. 650,318.

The object of my present improvement is to so construct thecasing-perforator that it can be invariably operated to perforate the isdesired to perforate and to allow the apparatus to be withdrawn from anypoint whenever desired Without perforating the casing during the act ofwithdrawal. By means of my present invention I am also able to d0 awaywith a portion of the latch shown in my former application, therebysimplifying and cheapening the device, while improving its operation, asabove stated.

An important object of my invention consists inso constructing themachine as to dispense with the use of the latch in Withdrawing themachine through the casing, for the reason that said latch is liable tobreakage and to being clogged up with sand and other material in thewell.

The accompanying drawings illustrate my invention.

Figure I is a perspective view of my invention descending thewell-casing with the parts in position to prevent the perforatingtoolfrom operating While the apparatus is descending. Parts are broken awayfor clearness of illustration. Fig. II is a perspective view of theapparatus with the parts in the position they assume when the apparatusis .being drawn up after having been lowered below the place to beperforated. In this view the parts are shown in position with the meansfor holding the apparatus extended released ready to allow the body ofthe apparatus to slide down along the perforating-tool carrier. Portionsare also broken away for clearness of illustration. Fig. III is aperspective view 0f the apparatus with the partsin position forperforatinga casing. The body of the apparatus is broken away moreextensively than in the other two views to expose the perforating-toolin operation. Fig. IV is an axial section on line indicated by IV IV,Figs. I and V. Fig. V is a section on line V V, Figs I and IV. a is theperforating-tool carrier, furnished with a frictional device of. anysuitable character, as indicated at b, vfor engagement with thewell-casing c. A d is the body of the apparatus. The carrier a isslidingly connected with said body d. Suitable means are provided fortemporarily preventing the body from sliding down along the carrier.Anysuitable means may be employed for this purpose; but in the drawingsI have shown a latch e, pivotally connected with the carrier a throughthe medium of the pivot f, and the latch-guide g,whichisfas-V7 'of tenedto the carrier a by the bolt or rivet h. The pivotf pivots the latch ein a slot 1l in the latch-guide g.

j indicates a perforating-tool mounted on the carrier a. to movelaterally and longitudinally of the body d. Said body is furnished withabent guide k, extending along the body and adapted and arranged to holdthe perforating-tool j out of operative adjustment when said tool is atits lower position and to project the tool into operative position whenthe tool is at its upper position. The guide for this purpose consists in the bent walls of the slot k, which slot at its upper portion inclinestoward that side of the body from which the perforating-tool is toproject when in operative position, so that when the axle m of theperforating-toolj is brought into the upper portion of the slot theperforating-tool will be brought into position to project beyond theperiphery of the body, so as to engage the casing to perforate the same.

1 indicates the outwardly-inclined upper portion of the guide. The lowerportion 2 of the guide is arranged parallel with the axis of the body ofthe tool and extends a distance substantially equal to the length of thevtop finger or pin 3 of the latch.

4 indicates a socket in the lower end of the body b to chamber theiinger 3 of the latch 10o to hold the latch to prevent the body lfromsliding down along the carrier when the apparatus is at first beinglowered through the casing, before starting the perforator intooperation.

n indicates a slot extending transversely of the carrier to receive theend of the axle m, which carries the perforatingtool j. This slot allowsthe axle in to move laterally relative to the carrier-body, thus tobring the perforating-toolj into its operative and into its inoperativepositions, respectively, and to hold the tool solidly in the desiredposition.

o indicates the guide in the body to cause the carrier and body to movelengthwise relatively to each other.

p indicates a spring to throw the latch e into position to enter achamber q therefor in the body of the apparatus.

In practical operation, when the tool is to be inserted into thewell-casing, the frictional device b will lirst be brought into thecasing with the finger 3 of the latch inserted into the socket 4therefor. Then the apparatus will be lowered into the well to therequired depth. When the apparatus has reached the lowest desired limit,then the body d will be drawn up, thus drawing said body away from thefrictional device l), and consequently sliding the body upward along thecarrier, so long as the friction between the friction device and thecasing holds the t'rictional device from moving and until the axle mcomes to the lower limit of the guide k. During the travel of the axle malong the lower portion 2 of the guide 7c the tool j will not shift, butwill be held so that the points of the perforating-tool will not projectto perforate the well-casing. \Vhen the apparatus has been raised tobring the tooljto a suitable point below where the upper end of thelowest line of perforations is to be, the body d will be drawn up andthe frictional device b will hold the carrier from moving until thefinger 3 is withdrawn from the socket 4 and is thrown by spring p intoline with the chamber q therefor. Then the body is lowered, and thus thetool j is brought into the position indicated in Fig. III, with thelatch 3 drawn up into the chamber q in said body and the axle m is atthe upper end of the oblique portion l of the guide, thus throwing thecutters or points of the tool out to engage the wall of the casing. Thebody d is then lowered, thus causing the perfor-ating tool or wheel j toperforate the casing until the lower limit for the line of perforationshas been reached. Then the apparatus will be drawn up and turned tobring the tooljinto position for another line of perforations and thenagain lowered. The operation j ust abovedescribed will then be repeateduntil the casing is fully perforated at that level. Then the apparatuswill be raised to another level and the operation again performed asbefore, and so on until the work is done.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

1. A casing-perforator comprising a perforating-tool carrier furnishedwith a frictional device for engagement with the well-casing; a bodywith which the carrieris slidingly connected; a perforating-tool`mounted on the carrier to move laterally and longitudinally of the body;said body being furnished with a guide extending along the body andadapted and arranged to hold the perforating-tool out 0f operativeadjustment when said tool is at its lower position and inclined upwardlytoward that side of the body from which the perforating-tool is toproject when in operative position and means for temporarily holding thebody from sliding down the carrier when the apparatus is descending withthe frictional device in contact with the well-casing.

2. The combination ofthe body; a perforating-tool carrier connected withsaid body t0 slide therealong and furnished with a fri@ tional devicefor engagement with a well-ca;- ing; a perforating-tool carried by saidcarrier and having a limited movement transverse said carrier; a latchpivoted to said carrier and furnished with a finger of definite lengthlsaid body being furnished with a socket ofa given length to seat saidfinger to hold the carrier in extended position, and said body beingalso furnished with a guide for said perforating-tool, the upper portionof said guide being inclined upwardly toward that side of the body fromwhich the perforatingtool is to project when in operative position; thelower portion of said guide extending parallel with the axis of the bodya suficient distance to allow the finger to withdraw from the seat inthe body when the carrier is in its fully-extended position; and meansfor withdrawing the finger out ofthe way of the body when said nger isreleased from said socket.

In testimony whereot` I have signed my name to this specification, inthe presence of two subscribing witnesses, at Los Angeles, California,this 26th day of December, 1900.

EDWIN A. HARDISON.

Vitnesses:

JAMES R. TowNsEND, JOHN A. MORRIS.

ICO

